package com.bwie.filter;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.concurrent.TimeUnit;

@Configuration
public class GlobFilter implements GlobalFilter , Ordered {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String url = request.getURI().toString();
//        request.getRemoteAddress().getAddress().toString()
        //白名单
        if (url.contains("/loginMobile")){
            return chain.filter(exchange);
        }
        //检查token
        String token = request.getHeaders().getFirst("token");
        if (token==null){
            System.out.println("token未空，请先登录");
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        Claims body = Jwts.parser().setSigningKey("123456")
                .parseClaimsJws(token).getBody();
        Integer userId = body.get("userId", Integer.class);
        String tokenKey = "token-"+userId;
        String redisToken = stringRedisTemplate.opsForValue().get(tokenKey);
        if (redisToken==null){
            System.out.println("token过期，请重新登录");
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        if (!redisToken.equals(token)){
            System.out.println("token错误，重新登录");
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        stringRedisTemplate.expire(tokenKey,40, TimeUnit.MINUTES);
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
